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CVE-2017-1000257 Details

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NameCVE-2017-1000257
StatusCandidate
DescriptionAn IMAP FETCH response line indicates the size of the returned data, in number of bytes. When that response says the data is zero bytes, libcurl would pass on that (non-existing) data with a pointer and the size (zero) to the deliver-data function. libcurl's deliver-data function treats zero as a magic number and invokes strlen() on the data to figure out the length. The strlen() is called on a heap based buffer that might not be zero terminated so libcurl might read beyond the end of it into whatever memory lies after (or just crash) and then deliver that to the application as if it was actually downloaded.
ReferencesBID:101519
URL: http://www.securityfocus.com/bid/101519
CONFIRM: https://curl.haxx.se/docs/adv_20171023.html
DEBIAN:DSA-4007
URL: http://www.debian.org/security/2017/dsa-4007
GENTOO:GLSA-201712-04
URL: https://security.gentoo.org/glsa/201712-04
REDHAT:RHSA-2017:3263
URL: https://access.redhat.com/errata/RHSA-2017:3263
REDHAT:RHSA-2018:2486
URL: https://access.redhat.com/errata/RHSA-2018:2486
REDHAT:RHSA-2018:3558
URL: https://access.redhat.com/errata/RHSA-2018:3558
SECTRACK:1039644
URL: http://www.securitytracker.com/id/1039644
PhaseAssigned (20171031)
VotesNone (candidate not yet proposed)
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